JPH1037463A - Concrete conveying pipe line device and concrete placing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the operation for closing a cut-off valve in the vicinity of a concrete placing inlet after the completion of concrete-place into a form. SOLUTION: A concrete conveying pipe line device 20 is applied to a concrete placing method for conveying the concrete into a form from the side of the form. In that case, a concrete conveying pipe 26 is connected to a concrete placing inlet pipe. a pipe line cut-off device 46 is provided to the concrete conveying pipe 26, and a pressure adjustment 27 used for pipe line air vent is provided to an upstream section 26b thereof. After the completion of concrete place, a cover 57 of the pressure adjustment 27 used for pipe-line air vent is opened, and the cut-off valve 45 is immediately closed. Then, since the upstream side of the cut-off valve 45 is evacuated, the cut-off valve 45 can be closed in a state to act no high on the cut-off valve 45, and the cut-off valve 45 can be closed with light force.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete pouring method for press-fitting concrete into a form from the side of the form, and a concrete pressure-feeding pipeline device applied to this type of concrete pouring method.

[0002]

2. Description of the Related Art A general concrete casting method involves pouring concrete through an opening at the top of a formwork.
When the lower floor pillars and walls are constructed after the upper floor is constructed (see JP-A-2-252861), when the concrete-filled steel tubular column is constructed (see JP-A-5-280198), the steel concrete segment is molded. In some cases (see Japanese Patent Application Laid-Open No. 8-42294), a construction method of pressing concrete into the form from the side of the form may be adopted. In this type of concrete casting method, as shown in FIG. 8, a pipe line is cut off near the concrete pressure inlet 2 on the side of the formwork 1 so as to prevent the concrete in the cast form from flowing backward. Although a pipeline shutoff device 3 having a shutoff valve 3a is provided, the conventional concrete pumping pipe 4 is simply provided with the pipeline shutoff device 3 as shown, and an opening is provided on the outer periphery of the concrete pumping pipe 4. It will not be done. In FIG. 8, reference numeral 5 denotes a mouth tube of the concrete pressure inlet 2 of the formwork 1, and reference numeral 6 denotes a flexible tube connected to the concrete pressure pump. In this type of concrete placing method, the concrete finished surface is flat near the concrete inlet 2 of the form 1, that is, close to the concrete inlet 2 so that it is flush with the inner surface of the form. Although various measures such as provision of a stopcock are provided, and members, mechanisms, and devices corresponding to the measures are provided, an opening is not provided on the outer periphery of the concrete pumping pipe 4 as described above.

[0003]

In the concrete casting method described above, when the concrete press-fitting into the formwork 1 is completed, the concrete pump is stopped, and then the shut-off valve 3 is turned off.
After closing a and removing the concrete pumping pipe 4,
The concrete will be cured, but as before,
In the pipeline shutoff device 3 having a simple shutoff valve 3a, the shutoff valve 3
The operation of closing a is not easy. That is, first, the pressure of the concrete pressed into the mold 1 is acting on the shut-off valve 3a. Second, the concrete pump is usually installed on a concrete pump truck, for example. Since the flexible tube 6 falls from above and is connected to the concrete pumping pipe 4 at a position higher than the connected horizontal concrete pumping pipe 4, the concrete pressure in the pipeline up to the concrete pump is also reduced by the shut-off valve 3a.
Therefore, a large force is required to slide the shut-off valve 3a, and it is not easy to close the shut-off valve 3a as described above. In addition, as described above, the concrete pump is usually at a high position, and the flexible tube 6 connected to the concrete pump is usually long, so that during the first concrete pumping in which concrete is sent into the empty flexible tube 6. The aggregate in the flowing concrete tends to separate from the mortar and be pumped first. If only the aggregate is first fed into the formwork 1 as described above, the quality of the finished concrete is reduced. In addition, even during the progress of concrete placement, aggregates may interfere with the reinforcing bars in the formwork 1 in the vicinity of the concrete inlet 2, and a plurality of aggregates may block each other in the vicinity of the concrete inlet 2. May occur and concrete injection may not be performed smoothly.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional disadvantages. The operation of closing the shut-off valve after the completion of concrete press-fitting is easy, and only the aggregates in the concrete are mixed with mortar during the first concrete pumping. An object of the present invention is to provide a concrete placing method and a concrete pumping line device which are not separately pumped and enable smooth pumping of concrete even during subsequent concrete placing.

[0005]

Means for Solving the Problems An invention according to claim 1 for solving the above-mentioned problems is a concrete pumping pipeline device used in a concrete placing method for press-fitting concrete into a form from the side of the form, A conduit shut-off device having a shut-off valve for shutting off the pipeline is provided near the concrete pressure inlet of the mold face plate in the concrete pumping pipe to the mold, and an opening opening on the outer periphery of the pipe is provided upstream of the shut-off valve. It is characterized in that a conduit air vent and pressure adjusting device having a lid for closing the opening is provided.

[0006] The concrete pumping pipeline device according to claim 4 comprises:
3. The concrete pressure-feeding pipeline device according to claim 1, wherein the pipeline is slid in a direction orthogonal to the pipe axis at an intermediate portion, which is connected to a mouth pipe of the concrete pressure inlet of the form face plate by a detachable mechanism. A first concrete pumping pipe provided with a first pipeline shutoff device having a first shutoff valve, and an intermediate portion connected to an upstream side of the first concrete pumping pipe by a detachable mechanism and orthogonal to the pipe axis. A second concrete pumping pipe having a second pipeline shut-off device having a second shut-off valve that slides in a direction to slide the pipeline.
The pipe air release and pressure adjusting device is provided at a position upstream of the second pipe cutoff device in the second concrete pumping pipe.

A sixth aspect of the present invention is a concrete casting method for press-fitting concrete into a form from the side of the form. After the first concrete pumping, with the concrete closed and closed by the shut-off valve, and with air bleeding from the pipe periphery upstream of the shut-off valve, the concrete fills the entire concrete pumping pipe up to the shut-off valve. The shut-off valve is opened and the concrete is fed to the formwork.

A seventh aspect of the present invention relates to a concrete placing method using the concrete pumping pipeline device according to the fourth aspect, wherein the first concrete pumping method is sequentially connected to a mouth pipe of a concrete pressure inlet of a form face plate. After pumping the concrete into the formwork via the pipe and the second concrete pumping pipe,
In the following steps (1) to (10), the mouth tube is closed. (1) The second shutoff valve and the first shutoff valve are closed. (2) Remove the second concrete pumping pipe from the first concrete pumping pipe. (3) Insert a cylinder having a closed push bolt receiving hole at the center of the shaft into the first concrete pressure pipe. (4) A state in which the tip of the push-in bolt of the primary pushing-in device, which includes a female screw member having a threaded hole formed in the shaft center portion and a push-in bolt screwed into the screw hole, is inserted into the push-in bolt receiving hole. Then, the female screw member is fixed to the pipe end of the first concrete pumping pipe. (5) Open the first shut-off valve. (6) Turn the pushing bolt and push the cylinder until it enters the mouth tube. (7) Temporarily fix the cylinder so that the cylinder does not fall out of the mouth tube. (8) Remove the first concrete pressure pipe from the mouth pipe. (9) A state in which the distal end of the push-in bolt of the secondary pushing-in device, which includes a female screw member having a threaded hole formed in the shaft center portion and a push-in bolt screwed into the screw hole, is inserted into the push-in bolt receiving hole. Then, the female screw member is fixed to the end of the mouth tube. (10) Turn the pushing bolt to push the cylinder to a position where the cylinder tip surface is flush with the mold inner surface.

[0009]

FIG. 1 is a block diagram showing an embodiment of the present invention.
This will be described with reference to an embodiment of FIG. This embodiment is applied to a case where a steel shell segment is filled with concrete to produce a steel shell concrete segment. FIG. 1 shows a steel shell segment 11 and a front mold 12 when the steel shell concrete segment is to be manufactured.
FIG. 2 is a longitudinal sectional view of a segment form 13 in which a front form 12 is attached to the steel shell segment 11 of FIG. Steel shell concrete segment is steel shell segment 1
1 is a structural member having concrete filled therein, and is generally used as a prefabricated wall member when constructing an inner wall of a cylindrical tunnel. This steel shell segment 1
1, a joining member for joining adjacent steel shell segments 11, a suspending portion for lifting work, anchor ribs, and other members are usually fixed by welding. In FIGS. Omitted.

This embodiment is applied as a vertical beating method in which concrete is filled in a state in which the steel shell segment 11 is in a vertical position. A front formwork 12 is provided on the front of the shell segment 11.
Is attached to form the segment form 13 and the front form 1
After the concrete is pressed into the formwork 13 from the mouth pipe 15 of the concrete pressure inlet 14 of the second and the concrete is hardened,
The front mold 12 is removed to obtain a steel shell concrete segment. The steel shell segment 1 of this embodiment
Reference numeral 1 denotes a structure having an inward flange 11a around the front surface as shown in the figure, instead of a simple steel segment having no inward flange and having a shape obtained by simply bending a lunch box having an open front side. Thus, in the case of the steel segment having the inward flange 1a, that is, the steel shell segment 11,
Conventionally, concrete is filled in a state of being laid horizontally. However, since the steel shell segment 11 is vertically filled with concrete as described above, that is, the vertical construction method is employed, the formwork according to the present invention is used. The concrete pouring method that presses concrete in from the side will be applied.

FIG. 3 shows a concrete pumping line device 2 for placing concrete in the segment form 13.
0 is shown in an exploded perspective view, and FIG. 4 shows the concrete pumping pipeline device 20 in a connected state during concrete pumping. The concrete press-feeding pipe line device 20 will be described in detail. The concrete press-in port 1 opened in the face plate 12a of the front formwork 12 is as follows.
A first concrete pumping pipe 24 connected to the mouth pipe 15 welded and fixed to the pipe 4 by an attaching / detaching mechanism 23, and a second concrete connecting pipe upstream of the first concrete pumping pipe 24 by an attaching / detaching mechanism 23 '. The second concrete pumping pipe 26 is provided with a pipe air release / pressure adjusting device 27. A flexible tube 28 connected to a concrete pump (not shown) is connected to the first concrete pumping pipe 26 via a joint pipe 29. Second concrete pumping pipe 2
6 and the joint pipe 29 are connected by a connection fitting 30.

The first concrete pumping pipe 24 is provided with a first pipe cutoff device 36 between the pipe side parts 24a and 24b.
It has. The first pipe line cutoff device 36 is provided with a first cutoff valve 35 that slides in a direction perpendicular to the pipe axis to cut off the pipe line, and holds the cutoff valve 35 so as to be slidable so that the pipe side portions 24a and 24b are provided. , A screw rod 38 attached to the shut-off valve 35, and a screw thread holding frame 39 welded and fixed to the main body 37. Consists of The shutoff valve 35 has a passage hole 35a equal to the inner diameter of the pipe as shown by the broken line.

The second concrete pumping pipe 26 has a second pipe blocking device 46 between both side portions 26a and 26b. The second pipeline shut-off device 46 has the same structure as the first pipeline shut-off device 35, and has a second shut-off valve 45 having a passage hole 45a, a main body 47, a slide screw rod 48,
The screw rod holding frame 39 has a female screw portion 39a.

The pipe air release / pressure adjusting device 27 comprises:
The second concrete pumping pipe 26 is provided at an upstream portion 26b. This pipeline air release and pressure adjusting device 27
As shown in detail in FIG. 5, the upward branch short pipe 55 connected to the upper surface side of the second concrete pumping pipe 26 is used.
And a lid 57 that can be opened and closed by turning up and down as shown by a two-dot chain line around a hinge 56 at the right end in FIG. 5 while closing the opening 55a at the upper end of the branch short pipe 55,
Elastic urging means 58 for elastically urging the lid 57 downward.
It consists of The elastic urging means 58 is rotatably mounted on a mounting plate 59 whose lower end is welded and fixed to the branch short pipe 55, and is provided with a notch 5 provided at the other end of the lid 57.
A rod 60 extending upward through the rod 7a; and an adjusting nut 6 screwed into a threaded portion 60a formed on the upper part of the rod 60.
1 and a coil spring 62 fitted on the rod 60 so as to be interposed between the adjusting nut 61 and the upper surface of the lid 57.

An attachment / detachment mechanism 23 for detachably connecting the mouth pipe 15 and the first concrete pumping pipe 24;
The detachable mechanism 23 ′ for detachably connecting the concrete pumping pipe 24 and the second concrete pumping pipe 26 has the same structure, and the two pipes 15 and 2 connected to each other.
4a (24b, 26a), on the outer periphery of the terminal portion, respectively, joint plates 65, 66 (6
5 ', 66'), at least one of which extends to the mating side to form a mating joint plate 65, 66 (65 ', 66').
And a taper pin 67 is inserted into pin holes 65a, 66a (65'a, 66'a) provided in the overlapping portion of the joint plates 65, 66 (65 ', 66'). It is.

In FIG. 3, reference numeral 70 denotes a cylinder which is set in the mouth pipe 15 in order to flatten a finished concrete surface near the concrete pressure inlet 14. Reference numeral 71 denotes a primary pushing device used for pushing the cylinder 70, and reference numeral 72 denotes a secondary pushing device. As shown in the cross section in FIG. 6, the cylinder 70 is provided with a circumferential groove 77 for temporary fixing on an outer periphery of an intermediate portion of a cylinder body 76 having an elongated push bolt receiving hole 75 having a rounded bottom 75a at an axial center portion. Is formed, and a rubber coating 78 for preventing concrete leakage is provided on the outer periphery on both sides thereof.

The primary push-in device 71 has a slightly thick disk-shaped female screw member 81 having a threaded hole 81a formed in the axial center thereof, and a joint plate having a pin hole 82a welded and fixed to the outer periphery of the female screw member 81. 82, a push bolt 83 screwed into the screw hole 81a. The secondary push-in device 72 has the same structure as the primary push-in device 71, and has a female screw member 91 having a screw hole 91a.
It comprises a joint plate 92 having a pin hole 92a and a pushing bolt 93, which is short.

Next, a method of manufacturing a steel shell concrete segment by filling concrete into the steel shell segment 11 will be described. As shown in FIG. 2, a steel shell segment 11, which itself becomes a formwork, is erected on a spar 16, and a front formwork 12 is attached thereto to form a segment formwork 13. The flexible tube 2 connected to the first concrete pumping pipe 24 and the second concrete pumping pipe 26 and connected to a concrete pump (not shown)
9 is connected to the second concrete pumping pipe 26 via the joint pipe 29. The connection between the mouth pipe 15 and the first concrete pumping pipe 24 is made by the respective joint plates 65 and 6.
The ends of the pipes are abutted so that the pipes 6 overlap each other, and the taper pins 37 are driven into the pin holes 65a and 66a for connection. The first
The connection between the concrete pumping pipe 24 and the second concrete pumping pipe 26 is the same.

Then, the first shutoff valve 35 is opened and the second shutoff valve 45 is closed. The coil spring 62 of the pipe air release / pressure adjusting device 27 adjusts the adjusting nut 61 to appropriately adjust the elastic pressing force of the coil spring 62 against the lid 57.

After the above preparation, concrete is pumped by a concrete pump (not shown). At the time of the first concrete pumping, the second shut-off valve 45 is closed, and the pipe air release and pressure adjusting device is provided. Since the lid 57 of the 27 is also closed by being elastically urged by the coil spring 62, the pressure in the pipeline increases when concrete is sent through the pipeline. Therefore, concrete will be sent in a pipeline under a certain pressure, and aggregate will be less likely to be separated from the mortar than in a simple open pipeline. . When the pressure in the pipeline exceeds a certain level, the lid 57 opens against the reaction force of the coil spring 62 to allow air to escape, so that the concrete can reach the second shutoff valve 45. When the concrete reaches the second shut-off valve 45, the branch short pipe 5
The concrete pump overflows from the opening of 5, but at that stage the concrete pump is temporarily stopped. There is no particular problem that the concrete overflows a little. Next, after the shut-off valve 45 is opened by turning the slide screw rod 48 and the operation of the concrete pump is restarted, the concrete flows into the formwork 13 through the first concrete pressure feeding pipe 24 and the mouth pipe 15. At the time of this first concrete pumping, the concrete inlet 1
Since the aggregate and the mortar have been sent to the vicinity of 4 without being separated, the flow of only the aggregate into the mold 13 is prevented. If a situation occurs in which a plurality of aggregates interfering with a not-shown reinforcing bar in the formwork 13 closes the concrete pressure inlet 14 near the concrete pressure inlet 14 during concrete placement, At this time, the pressure rapidly increases. At this time, since the lid 57 of the pipeline air venting / pressure adjusting device 27 is opened and concrete overflows, a trouble that the pressure in the pipeline excessively increases can be avoided. Then, since the emergency can be discovered at an early stage, for example, when the vicinity of the concrete pressure inlet 14 of the form face plate 12a is hit with a hammer to give vibrations, and the aggregates remaining in the rebar are dispersed, The emergency situation is resolved, and smooth concrete pumping can be continued.

When the press-fitting of the concrete into the mold 13 is completed, the concrete pump is stopped. Next, in the following steps (1) to (8), the mouth tube 15 is closed. (1) The second shutoff valve 45 is closed. In this case, the lid 57 of the pipeline air release / pressure adjusting device 27 is opened, and the second shut-off valve 45 is closed without a pause. Shut-off valve 4
Since the upstream side of 5 is evacuated, the shut-off valve 45 can be closed in a state where a high pressure does not act on the shut-off valve 45, that is, without requiring a large force, so that the operation of closing the shut-off valve 45 is extremely easy. Become. Although the concrete slightly overflows from the branch short pipe 55, the shut-off valve 45
There is no particular problem because it is a short time just to close.
Next, the first shutoff valve 35 is closed. Although the first shutoff valve 35 may be closed before the second shutoff valve 45,
The second shut-off valve 4 close to the pipeline air release / pressure adjusting device 27
5 is closed first, the pipeline air release and pressure adjustment device 27
Works effectively, and the operation of closing the shutoff valve is easy. (2) Remove the second concrete pumping pipe 26 from the first concrete pumping pipe 24 and the joint pipe 29. Second
The operation of releasing the connection between the concrete pumping pipe 26 and the first concrete pumping pipe 24 only requires pulling out the taper pin 67, so that the releasing operation is extremely simple. (3) After removing the concrete in the upstream part 24b of the first concrete pumping pipe 24, the cylinder 70 is connected to the pipe 2
4b. (4) The female screw member 81 is fixed to the end of the first concrete pumping pipe 24 with the tip of the pushing bolt 83 of the primary pushing device 71 inserted into the pushing bolt receiving hole 75 of the cylinder 70. This fixing is performed by connecting the overlapped joint plate 65 and the joint plate 82 with tapered pins (the same as those shown by 67). (5) Open the first shut-off valve 35. (6) Turn the push bolt 83 to push the cylinder 70 until it enters the mouth tube 15. (7) The temporary fixing pin 96 is inserted through the temporary fixing pin insertion hole 15a formed on the outer periphery of the cylinder 70 so that the tip of the temporary fixing pin 96 enters the temporary fixing circumferential groove 77 on the outer periphery of the cylinder 70 so that the cylinder 70 does not come out of the mouth tube 15. And temporarily fix the cylinder 70. (8) Remove the first concrete pumping pipe 24 from the mouth pipe 15. (9) With the tip of the pushing bolt 93 of the secondary pushing device 72 inserted into the pushing bolt receiving hole 75 of the cylinder 70 in the mouth tube 15, the female screw member 91 is inserted into the mouth tube 15.
To the pipe end. This fixation is performed with the joint plate 65,
92 and a taper pin (same as above, and description is omitted). (10) Turn the push-in bolt 93 to push the cylinder 70 to a position where the cylinder tip surface is flush with the inner surface of the mold face plate 12a as shown in FIG. In this case, the cylinder 70 can be advanced by the width of the circumferential groove 75 for temporary fixing on the outer periphery. (9) The concrete is cured in this state.

With the above, the concrete casting for one segment form 13 is completed, but the first concrete pumping pipe 24 and the second concrete pumping pipe 26, 1
The next push-in device 71 can be diverted to placing concrete in the next prepared segment formwork.

After the concrete hardens, it is released from the mold. However, since the tip end surface of the cylinder 70 is flush with the inner surface of the mold face plate 12a, a flat concrete finished surface can be obtained near the concrete pressure inlet 14.

Since the lid 57 of the pipe air release / pressure adjusting device 27 of the embodiment is elastically urged by the coil spring 62, the pressure in the pipe is maintained even when concrete is being poured. This has the effect of being able to cope with the emergency situation of an abnormal rise of the vehicle, but the configuration may be such that the lid is closed. In this case, the lid is opened at the time of the first concrete pumping, and after the concrete fills the pipeline up to the second shutoff valve 45, the lid is closed by hand. Further, the opening in the pipe air release / pressure adjusting device is not limited to the case where the upper end of the branched short pipe 55 is made an opening as in the embodiment, but a hole formed in the outer peripheral surface of the first concrete pumping pipe 26. The opening itself may be used as the opening.

Although it is preferable that the first concrete pumping pipe 24 and the second concrete pumping pipe 26 be arranged horizontally as in the embodiment, it is not excluded that they are arranged at an inclination.

In the above embodiment, the concrete casting for producing the steel shell concrete segment has been described. However, a simple curved concrete box-shaped steel segment having no inward flange 11a on the front side is merely used for concrete. Naturally, it can be applied to the case of manufacturing a segment. It can also be applied to the construction of lower floor columns and walls after the construction of the upper floor, and the construction of concrete filled steel pipe columns. In short, the present invention can be applied to various types of concrete casting in which concrete is pressed into the form from the side of the form.

[0027]

According to the present invention, since the pipeline air bleeding and pressure adjusting device is provided on the upstream side of the shut-off valve, when the shut-off valve is closed after the concrete has been pressed into the formwork, the upstream of the shut-off valve is required. By closing the shut-off valve while bleeding air on the side,
The shut-off valve can be closed without high pressure acting on the shut-off valve, which makes it extremely easy to close the shut-off valve.

According to a second aspect of the present invention, if the lid is automatically opened when the pressure in the concrete pumping pipe is excessively increased by providing an elastic urging means in the pipe air release / pressure adjusting device, the concrete pouring can be performed. During installation, even if a situation occurs in which a plurality of aggregates that interfere with the reinforcing steel in the form near the concrete pressure inlet block up the vicinity of the pressure inlet, the situation does not worsen. The necessary steps can be taken at the stage and necessary measures can be taken, so that smooth concrete pumping can be continued.

According to the third aspect, it is possible to easily and appropriately adjust the pressing pressure against the lid in the pipeline air release / pressure adjusting device. In addition, the lid can be easily closed and elastically biased, or the lid can be completely opened.

According to the fourth or seventh aspect, the finished concrete surface near the concrete pressure inlet can be easily and reliably flattened. And, when similar concrete placement is continued at multiple locations,
The devices and members can be diverted sequentially, and the work of placing concrete from the side of the formwork can be performed smoothly.

According to the fifth aspect, the mechanism for detachably connecting the pipes is extremely simple, and the work of attaching and detaching is easy.

According to the sixth aspect, at the time of the first concrete pumping, the concrete is fed into the form after the concrete is filled in the concrete pumping pipe, so that the aggregate is separated from the mortar during the first concrete pumping. There is an effect that it can be prevented from being sent into the mold first. This can prevent the quality of the finished concrete from deteriorating.

[Brief description of the drawings]

FIG. 1 is a perspective view of a steel shell segment and a front formwork when a steel shell concrete segment is to be manufactured by a concrete casting method according to one embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a segment formwork obtained by attaching a front formwork to the steel shell segment of FIG. 1;

FIG. 3 is an exploded perspective view showing a state in which a concrete pressure-feeding pipeline device according to one embodiment of the present invention is connected to the segment formwork of FIG. 2;

FIG. 4 is a side view showing a state where the concrete pumping pipeline device of one embodiment of the present invention is connected to the segment formwork of FIG. 2;

FIG. 5 is a sectional view taken along line AA of a main part in FIG.

FIG. 6 is a longitudinal sectional view of the cylinder in FIG.

FIG. 7 is a cross-sectional view of a mouth tube portion during concrete curing after the concrete placing operation is completed.

FIG. 8 is a cross-sectional view illustrating a conventional concrete placing method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Steel shell segment 12 Front formwork 12a Formwork face plate 13 Segment formwork 14 Concrete press-in entrance 15 mouth pipe 20 Concrete pumping pipeline device 23,23 'Detachable device 24 1st concrete pumping tube 26 2nd concrete pumping tube 27 Pipe air release / pressure adjusting device 28 Flexible tube 29 Joint pipe 35 First shutoff valve 36 First duct shutoff device 45 Second shutoff valve 46 Second duct shutoff device 55 Branch short pipe 57 Cover 58 Resilient Urging means 60 rod 61 adjusting nut 62 coil spring 65, 65 ', 66, 66' joint plate 65a, 65'a, 66a, 66'a pin hole 67 taper pin 70 cylinder 71 primary pushing device 72 secondary pushing device 75 pushing Bolt receiving hole 76 Cylinder main body 77 Peripheral groove 81, 91 Female Binding element 81a, 91a screw hole 82, 92 joint plate 83 and 93 push the bolt 96 temporarily fixed pin

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takanori Higono 2-6-3 Otemachi, Chiyoda-ku, Tokyo Inside Nippon Steel Corporation (72) Inventor Kiyoshi Mitani 1-9 Higashikanda, Chiyoda-ku, Tokyo -8 Within Environmental Engineering Co., Ltd. (72) Inventor Shoichi Fukumori 1-9-8 Higashikanda, Chiyoda-ku, Tokyo 1-9-8 Within Environmental Engineering Co., Ltd. (72) Yoshiyoshi Yonezawa 3 Iwamotocho, Chiyoda-ku, Tokyo −10−7 Inside Nikken Metal Co., Ltd. (72) Inventor, Shinichi Fujiwara 3-10-7 Iwamotocho, Chiyoda-ku, Tokyo Nikken Metal Co., Ltd.

Claims (7)

[Claims] 1. A concrete pumping pipeline device used for a concrete casting method for press-fitting concrete into a form from a side of the form, wherein a concrete press-in port of a face plate of a form in a concrete press-pipe to the form. A pipeline shut-off device having a shut-off valve for shutting off the pipe is provided in the vicinity, and a pipe air venting / pressure adjusting device having an opening that opens to the outer periphery of the pipe and a lid that closes this opening is provided upstream of the shut-off valve. A concrete pumping pipeline device provided. 2. The apparatus according to claim 1, wherein said pipe air bleeding and pressure adjusting device comprises: an upward branch short pipe connected in the middle of a horizontal concrete pumping pipe; an opening at an upper end of said branch short pipe; A lid that can be opened and closed by rotating up and down as
2. The concrete pumping pipeline device according to claim 1, further comprising elastic urging means for elastically urging the lid downward. 3. The resilient biasing means includes a rod having a lower end attached to the short branch pipe and extending upward through a notch provided on the other edge of the lid, and a resilient urging means formed on an upper part of the rod. 2. The method according to claim 1, further comprising: an adjusting nut screwed into the screw portion; and a coil spring fitted on the rod so as to be interposed between the adjusting nut and the upper surface of the lid. 2. The concrete pumping pipeline device according to 2. 4. A first shut-off valve having a first shut-off valve connected to a mouth pipe of a concrete pressure inlet of a form face plate by an attaching / detaching mechanism, the first shut-off valve being slid in a direction orthogonal to a pipe axis to shut off a pipe line. A first concrete pumping pipe provided with a pipe line blocking device, and a pipe which is connected to an upstream side of the first concrete pumping pipe by an attachment / detachment mechanism and slides in a direction orthogonal to the pipe axis at an intermediate portion. A second concrete pumping pipe provided with a second pipeline shut-off device having a second shut-off valve for shutting off the pipe, and the pipeline air bleeding and pressure adjusting device is connected to a second concrete pumping pipe in the second concrete pumping pipe. The concrete pumping pipeline device according to claim 1, wherein the pipeline device is provided at a position upstream of the pipeline blocking device. 5. The attachment / detachment mechanism includes a joint plate perpendicular to the outer peripheral surface of each of the end portions of two pipes connected to each other, at least one of which extends to a mating side and is connected to a mating joint plate. 5. A concrete pumping pipeline device according to claim 4, wherein said concrete plate is fixed so as to be superimposable and a taper pin is inserted into a pin hole provided in an overlapping portion of said joint plate. 6. A concrete pouring method for press-fitting concrete into a form from the side of the form, wherein a concrete valve in a concrete pumping pipe to the form is closed by a shut-off valve near a concrete pressure inlet of a form face plate. In the state, and in a state where air is bleed from the outer periphery of the pipe on the upstream side of the shut-off valve, the first concrete pumping is performed, and after the concrete is completely filled in the concrete pumping pipe up to the shut-off valve, the shut-off valve is closed. A concrete casting method characterized by opening and feeding concrete to a formwork. 7. A concrete casting method using the concrete pumping pipeline device according to claim 4, wherein the first concrete pumping pipe and the second concrete pumping pipe are sequentially connected to a mouth pipe of a concrete pressure inlet of a form face plate. After pumping concrete into the formwork through the concrete pumping pipe of No.2, the following (1)
A concrete casting method, wherein the mouth pipe is closed in the steps (10) to (10). (1) The second shutoff valve and the first shutoff valve are closed. (2) Remove the second concrete pumping pipe from the first concrete pumping pipe. (3) Insert a cylinder having a closed push bolt receiving hole at the center of the shaft into the first concrete pressure pipe. (4) A state in which the tip of the push-in bolt of the primary pushing-in device, which includes a female screw member having a threaded hole formed in the shaft center portion and a push-in bolt screwed into the screw hole, is inserted into the push-in bolt receiving hole. Then, the female screw member is fixed to the pipe end of the first concrete pumping pipe. (5) Open the first shut-off valve. (6) Turn the pushing bolt and push the cylinder until it enters the mouth tube. (7) Temporarily fix the cylinder so that the cylinder does not fall out of the mouth tube. (8) Remove the first concrete pressure pipe from the mouth pipe. (9) A state in which the distal end of the push-in bolt of the secondary pushing-in device, which includes a female screw member having a threaded hole formed in the shaft center portion and a push-in bolt screwed into the screw hole, is inserted into the push-in bolt receiving hole. Then, the female screw member is fixed to the end of the mouth tube. (10) Turn the pushing bolt to push the cylinder to a position where the cylinder tip surface is flush with the mold inner surface.